Unlock instant, AI-driven research and patent intelligence for your innovation.

High-strength composite heat-conducting silica gel sheet for new energy automobile battery

A thermal conductive silicone sheet, new energy vehicle technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low thermal conductivity, discounted thermal conductivity of graphite sheets, large air thermal resistance, etc. The effect of good adhesion and high thermal conductivity

Inactive Publication Date: 2019-10-25
新纶电子材料(常州)有限公司
View PDF10 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Thermally conductive materials such as metals and graphite sheets have good thermal conductivity, but due to their high brittleness and difficulty in molding, it is difficult to realize their applications.
At present, the common method is to wrap the entire battery pack with a thermally conductive silica gel sheet. However, when the thermal conductivity of the silica gel sheet is high, the strength will drop significantly, and there will be a problem of fragmentation during the winding operation. Therefore, the commonly used silica gel sheet has a low thermal conductivity. Below 3w / m.k, it cannot meet the general requirement that the temperature difference between the two ends of the battery is not more than 10 degrees
Some new energy vehicle manufacturers use artificial graphite for heat dissipation, but artificial graphite itself is brittle and conductive, and usually needs to be coated with an insulating film on the surface of the graphite sheet, which will greatly reduce the thermal conductivity of the graphite sheet
And because the insulating film is non-adhesive, it cannot be closely attached to the battery pack, and the air thermal resistance is large, which further weakens its heat conduction effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-strength composite heat-conducting silica gel sheet for new energy automobile battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The first is the preparation of silica gel slurry. The silica gel slurry includes silicone gel A component (such as Shin-Etsu 9212A, containing vinyl silicone oil and platinum catalyst), silicone gel B component (such as Shin-Etsu 9212B, containing vinyl silicone oil and Hydrogen-containing silicone oil), thermally conductive powders of different particle sizes. The proportion of thermal conductive powder is 94-95.5%, and the proportion of silicone gel is 4.5%-6%. According to different hardness requirements, the ratio of component A to component B of the silicone gel can be adjusted within the range of 1:1 to 1:1.3. First add the silicone gel component A and coarse powder (particle size 70-100um) into a double planetary mixer and stir for 30 minutes at room temperature, then add the powder with a particle size of 25-35um and continue stirring for 30 minutes, then add 1 / 2B component and fine powder Powder (0.6-1.5um) was stirred for 30 minutes, and finally the remainin...

Embodiment 1

[0026] A high-strength composite heat-conducting silicone sheet for new energy vehicle batteries. During production, the calender roll gap is controlled at 0.6mm, and the ratio of silicone gel component A (viscosity range 500-1000cps): component B is controlled at 1: 1. The particle size and proportion of the powder are controlled at 75u:40u:0.8u=6:4:1, and the powder content is controlled at 93%-93.5%, which can produce 0.3-0.5mm, tensile strength ≥ 0.8MPa, thermal conductivity Silicone sheet with a coefficient ≥ 4.5w / m.k.

Embodiment 2

[0028] A high-strength composite heat-conducting silicone sheet for new energy vehicle batteries. During production, the calender roll gap is controlled at 0.6mm, and the ratio of silicone gel component A (viscosity range 500-1000cps): component B is controlled at 1: 1. The particle size and ratio of the powder are controlled at 75u:40u:1.5u=6:3:2, and the powder content is controlled at 93% to 93.5%. It can be prepared with a thickness of 0.3 to 0.5mm, tensile strength ≥ 1.0MPa, and thermal conductivity Silicone sheet with coefficient ≥4w / m.k.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high-strength composite heat-conducting silica gel sheet for a new energy automobile battery, which comprises a five-layer structure, wherein the five-layer structure sequentially includes a release film I, a high-heat-conducting silica gel sheet I, high-heat-conducting carbon fiber cloth, a high-heat-conducting silica gel sheet II and a release film II from top to bottom. Compared with the prior technical scheme, the heat conductivity coefficient of the composite heat-conducting silica gel sheet can reach about 6w / m.k due to the addition of the high-strength carbonfiber cloth and is doubled on the basis of the existing technical scheme (2.8-3w / m.k); the material is good in adhesion and high in strength, and can be bent at will without cracking due to the support of the carbon fiber cloth; and material can maintain high strength and bendability while providing high heat conductivity, and provides a more efficient heat conduction effect for the new energy automobile battery.

Description

technical field [0001] The invention belongs to the technical field of battery packaging materials, and relates to a high-strength composite heat-conducting silica gel sheet used for new energy vehicle batteries. Background technique [0002] In recent years, due to the encouragement of the national sustainable development policy and new energy vehicle incentive policies, new energy electric vehicles have developed rapidly and are favored by more and more consumers. [0003] A pure electric vehicle is a vehicle that uses a single battery as the energy storage power source. It uses the battery as the energy storage power source, and supplies electric energy to the motor through the battery to drive the motor to run, thereby driving the car. Lithium-ion power batteries have quickly become a research hotspot due to their long cycle life, high energy density, and working voltage. However, heat accumulation is serious during battery operation, and heat-conducting materials are ur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M10/613H01M10/625H01M10/653H01M10/655
CPCH01M10/613H01M10/625H01M10/653H01M10/655Y02E60/10
Inventor 宋丽萍赵国钧
Owner 新纶电子材料(常州)有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com